.px2rem(@name, @px){
    @{name}: @px / 75 * 1rem;
}
*{
    padding: 0;
    margin: 0;
    list-style: none;
    font-family: "微软雅黑";
}
body,html{
    width: 100%;
    height: 100%;
    background: #ffffff;
}
.tan{display: flex;}
.pl(@w) {
    .px2rem(padding-left,@w)
}
.pr(@w) {
    .px2rem(padding-right,@w)
}
.pt(@w) {
    .px2rem(padding-top,@w)
}
.mt(@w) {
    .px2rem(margin-top,@w)
}
.ml(@w) {
    .px2rem(margin-left,@w)
}
header{
    .px2rem(height,98);
    background: #b80000;
    color: white;
    .px2rem(font-size,50);
    .tan();
    align-items: center;
    justify-content: space-between;
    span{
        display: block;
    }
    span:nth-child(1){
        .px2rem(padding-left,20);
        .px2rem(width,50);
        .px2rem(height,65);
        img{
            width: 100%;
        }
    }
span:nth-child(3){
        .px2rem(padding-right,20);
        .px2rem(width,40);
        .px2rem(height,65);
        img{
            width: 100%;
        }
    }
}
.zhuti{
    .tan();
    align-items: center;
    .px2rem(width,400);
    .px2rem(height,500);
    img{
            width: 100%;
            .px2rem(margin-left,170);
        }
}
nav{
    width: 93%;
    .px2rem(height,480);
    border: 2px solid #e7e7e7;
    border-radius:10px;
    background: #f5f5f5;
    .px2rem(margin-left,10);
    position: absolute;
    left: 10px;
    ul li{
        list-style: none;
        border-bottom: 2px solid #c7c7c7;
        display: block;
    }
    ul{
        li:nth-child(1){
            .px2rem(margin-left,10);
            .px2rem(height,80);
            color: #333333;
            .px2rem(font-size,35);
            .px2rem(line-height,80);
        }
        li:nth-child(2){
            .px2rem(margin-left,10);
            .px2rem(height,80);
            color: #333333;
            .px2rem(font-size,35);
            .px2rem(line-height,80);
            span:nth-child(1){
                color: red;
            }
            span:nth-child(2){
                text-decoration:line-through;
                color: #8c8c8c;
            }
        }
        li:nth-child(3){
            .px2rem(margin-left,10);
            .px2rem(height,80);
            color: #333333;
            .px2rem(font-size,35);
            .px2rem(line-height,80);
            .tan();
            align-items: center;
            justify-content: space-between;
        }
        li:nth-child(4){
            .px2rem(margin-left,10);
            .px2rem(height,80);
            color: #333333;
            .px2rem(font-size,35);
            .px2rem(line-height,80);
            .tan();
            align-items: center;
            justify-content: space-between;
        }
        li:nth-child(5){
            .px2rem(margin-left,10);
            .px2rem(height,130);
            color: #999999;
            .px2rem(font-size,30);
            .px2rem(line-height,80);
            .tan();
            align-items: center;
            justify-content: space-between;
            border-bottom: none;
        }
    }
}
.span{
    position: absolute;
    .px2rem(top,1120);
    .px2rem(left,140);
    button:nth-child(1){
        .px2rem(width,200);
        .px2rem(height,50);
        .px2rem(border-radius,10);
        background: #a3a3a3;
    }
    button:nth-child(2){
        .px2rem(width,200);
        .px2rem(height,50);
        .px2rem(border-radius,10);
        background: red;
        .px2rem(margin-left,20);
    }
}